Electric cooktop



FIG. 1 is a front perspective view of an electric cooktop, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines illustrating portions of the electric cooktop are for environmental purposes only and form no part of the claimed design. The dot dash lines in the figures represent an unclaimed boundary line and form no part of the claimed design. The diagonal shading lines in FIGS. 1 and 6 represent a reflective surface. 

CLAIM The ornamental design for an electric cooktop, as shown and described. 